Version 5 (modified by 12 years ago) ( diff ) | ,
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The Genius PC is a home computer from VTech. Released in the late 90s, it is one of the last microcomputers.
Hardware :
- Motorola MC68EC000, 16-bit external databus, 32MHz
- 256K of RAM
- 1 to 4M of ROM (not sure yet) - Sharp LH537NWN mask ROM
- Mass storage : 128KB flash memory - AM29F010
- Cartridge port, apparently on memory bus with system ROM and storage flash. The french system comes with cartridges only containing straps, likely shorting some pins enable extra features... The german version seems to have extra flash memory or maybe ROM ?
The ROM seems to be a 16-bit one, available directly on the CPU bus. The FLASH is 8-bit, but directly on the CPU bus as well. The RAM is accessed through the VTech 27-05793 chip, which likely handles memory refresh. I don't know if the RAM is mapped as 16 or 8-bit to the CPU.
Other chips
- BH7236AF : Video encoder (PAL/NTSC + RGB output). On french motherboard RGB is used, composite is not wired.
- LMT324 : LM324, used as audio amplifier
- C807U : Toshiba microcontroller. Handles mouse and keyboard scanning, LEDs, on/off buttons, etc. Running at low speed out of internal RC oscillator, as there is no external crystal for it. Seems to communicate with the VTech chip through a serial link.
- VTech 27-05793 : of course a datasheet of this one woumd make things easier. Seems to be also called "LS05PR730C102" ?
Output : RGB color video and mono sound.
Color palette is at least 15 colors :
- White
- Light grey
- Dark grey
- Black
- Sky blue
- Blue
- Red
- Green
- Dark green
- Yellow
- Orange
- Brown
- Dark brown
- Mauve
- Pink
Resolution seems to be something like 480x200
Attachments (10)
-
BH7236AF.pdf
(75.1 KB
) - added by 12 years ago.
Datasheet of video driver
-
LM324-D.PDF
(178.8 KB
) - added by 12 years ago.
Datasheet of audio amplifier
-
M68000UM.pdf
(7.4 MB
) - added by 12 years ago.
Datasheet of the 68000 CPU
-
tmp87c807u.pdf
(4.8 MB
) - added by 12 years ago.
Datasheet of the C807U keyboard and mouse controller
-
hy534256.pdf
(755.3 KB
) - added by 12 years ago.
Datasheet of the RAM chips
-
AM29010.pdf
(370.2 KB
) - added by 12 years ago.
Datasheet of the mass storage flash chip
-
LH5316.pdf
(53.6 KB
) - added by 12 years ago.
System ROM datasheet (or close enough)
-
VTechROM.zip
(836.9 KB
) - added by 12 years ago.
System ROM dump.
- GERMAN.ROM.zip (842.5 KB ) - added by 12 years ago.
-
US_CAN.zip
(776.3 KB
) - added by 22 months ago.
System ROM (US-Canada version)
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